Heterocyclic Compounds
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ChemInform Abstract: Highly Efficient Synthesis of 2-Substituted 4H-Chromen-4-ones by Means of F--Induced 6-endo-digonal Cyclization of o-(Silyloxy)phenyl Ethynyl Ketone Derivatives.
First published: February 7, 1995
Abstract
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ChemInform Abstract
Under the optimized conditions A), cyclization of various ethynyl ketones is successful to give the title compounds in good to excellent yields. The method is simple and efficient and represents a general approach to 2-substituted 4H-chromen-4-ones, a segment present in the antitumor antibiotics kapurimycin A3 and altromycin.
